13
1*12
2*6
1*2+2*5,1*4+2*4,1*6+2*3,1*8+2*2,1*10+2*1
1*7+5*1,1*2+5*2
2*1+5*2
5*1+2*1+1*5,5*1+2*2+1*3,5*1+2*3+1*1